Film-developing rack



WITNESSES nuHlJi I N. E. LUBOS'HEZ.

FILM DEVELOPING RACK. APPLICATION FILED MAR- 21. I919. RENEWED DEC- 27,I920- Patented July 5, 1921.

INVEN TOR.

AYTORJVEMS'.

UNITED STATES PATENT OFFICE.

NAHUM ELLEN LUBOSHEZ, OF LONDON, ENGLAND, ASSIGNOR TO EASTMAN KODAKCOMPANY, OF ROCHESTER, NEVJ YORK, A CORPORATION OF NEW YORK.

FILM-DEVELOPING RACK.

Specification of Letters Patent.

Patented July 5, 1921.

.Application filed March 27, 1919, Serial No. 285,498. Renewed December27, 1920. Serial No. 433,429.

To all whomit may concern lie it known that I, NAHUM E. Lunosrrnz, acitizen of the United States of America, residing at London, in thecounty of Essex, England, have invented certaln new and usefulImprovements in Fllm'rDeveloplng Racks, of which the following is afull, clear, and exact specification.

My invention relates to a rackpr frame for supporting photographic filmdur ng the processes of developing, washing fixing, or any other processin which the film 1s bathed. The object of the invention is the makingof a simple and easily operated rack which is efficient for the purposesdescrlbed.

Reference is now made to the accompany ing drawing in which likereference characters refer throughout to the same parts:

Figure 1 is a perspective view of one form of my novel rack;

Fig. 2 is a perspective view of a second form;

Fig. 3 is a cross section of a portlon of the rack shown in Fig. 1; i

Fig. 4 is a section taken on the line 4.-i of Fig. 1;

Fig. 5 is a section taken on the line 55 of Fig. 2, and

Fig. 6 is a section taken on the same line but with the movable bar inanother position.

Fig. 7 is a fragmentary detail showing a modification.

The rack comprises a rectangular frame 1, which may be made of wood,fiber, or any other desired material. Upon the upper corners angle bars2 are attached by wh1ch the rack as a whole may be supported from theedges in a suitable tank. The inner edges of the sides of the frame aregrooved or rabbeted, as at 3, upon one face thereof. Mounted upon theframe are two L'-shaped members 4; the arms of the members extendingalong adjacent side bars of the frame. Each member 4: has a diz igonallyarranged slot 5 at its elbow and also at the end of each arm. TheL-shaped members or strips 4L are held against the frame 1 by screws 6which extend through the slotso. When the L-shaped strips are movedtoward the interior of the frame their edges will overhang the grooves3, asclearly shown in Fig. 1, and when withdrawn leave the groove open,as shown in Fig. 3. The frictional engagement between the parts is suchthat the strip will remain in either adjusted position.

In use, the frame is laid down upon a flat horizontal surface with thestrips withdrawn from above the grooves, as-in Fig. 3, and the film 7 islaid in place. Itis understood that films and frames are supplied insizes corresponding to each other. The movable surips are then slid overthe grooves and the rack placed in the tank. In the form shown in Fig.2, a bar 2 extends across the top and its ends are used to engage thesides of the tank to support the rack 1, which consists of side bars 8,lower crossbar 9 and upper crossbar 10. In this form, which is made ofsheet metal, the bars 8, 9 and 10 are struck to provide a groove 3corresponding to the groove 3 of the first described form and having thesame functions. Slidable L-shaped members 4: having slots 5 are held inproper position by the screws 6'. The slots may be of any desired orpreferred form, such as to prevent the accidental slipping of the L-shaped members with respect to the frame. One such form of slot is shownin Fig. 7. It will be apparent that when the slot 5 is in its raisedposition and the screw 6 in the position shown in Fig. 7 it will be lessliable to slip when the inclination of the part of the slot engaging thescrew is less, as shown in this figure.

The frame as a whole is simple and inexpensive in construction andexceedingly easy to manipulate, but it holds the film securely duringthe operations. In Fig. 1 a film 7 is shown held in position and in Fig.2 the L- shaped members are withdrawn, the rack being ready for theplacing of a film therein. It is, of course, understood that this framemay also be used for plates as well as films, and the term plate as usedin the claims includes any sensitized element.

Any modification included within the scope of my invention as defined inthe claims are contemplated, and this disclosure is to be taken, to thatextent, as illustrative.

Havin thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A developing rack comprising a frame with side and end bars, certainof said bars having ledges formed upon one side and along their inneredge upon which the edges of a plate may be laid and movable strips onsaid bars adapted to be moved into or out of position above said ledges.

2. A developing rack comprising a rectangular frame having suspendingmeans at one end, the bars comprising the frame having on one side alongtheir inner edge an open groove, strips mounted on said bars to slideover said grooves so as to form therewith channels opening toward theinside of the frame.

3. A developing rack comprising a rectangular frame having suspendingmeans at one end, the bars comprising said frame hav ing ledges on oneside and along their inner edge upon which the edges of a plate or sheetfitting within said frame may be laid and strips slidably mounted on thebars and movable into or out of a position overlying said ledges.

4. A developing rack comprising a rectangular frame, the bars comprisingsaid frame having rabbeted inner edges on one face and two L-shapedmembers mounted to slide obliquely on the frame, the legs of each memberwhen thus slid sin'iultan-eously covering or uncovering the rabbetededges of two adjacent bars.

5. A developing rack comprising a rectangular frame, the bars comprisingtwo adjacent sides having on their inner edges means for supporting theedges of a plate, the bars on the other two sides being rabbeted andcarrying a strip having two legs at right angles to each other. the legsbeing adapted to be slid by a single oblique motion over the rabbetededges of the two last mentioned sides.

Signed at London, England, this 27th day February 1919.

NAHUM ELLEN LUBOSHEZ.

